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Basics of Nuclear Physics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. How can a strong Coulomb force be overcome during nuclear fusion?

Question 2 2. What is the half-life in the graph below?

Question 3 3. The process of hitting an unstable nucleus with a neutron to break it into two atoms is called _____.

Question 4 4. The amount of time it takes for half of a sample to decay is known as _____.

Question 5 5. Which of these is true about Beta plus decay?

Page 2

Question 6 6.

Complete the following nuclear equation:

Pu-240 → _____ + U-236

Question 7 7. Which of these can be used to absorb the neutrons emitted during a nuclear reaction?

Question 8 8. Rubidium-strontium dating was used to to find the age of which of the following?

Question 9 9. Which of these statements is true about radioactive decay?

Question 10 10. In gamma decay, a(n) _____ is given off.

Page 3

Question 11 11. During _____ two protons and two neutrons are given off.

Question 12 12. Radioactive isotopes decay until they _____.

Question 13 13. An atom with extra neutrons is called a(n) _____.

Question 14 14. Which of the following is an example of an uncontrolled nuclear chain reaction?

Question 15 15. Which of the following is the MAIN way that nuclear reactors control chain reactions?

Page 4

Question 16 16. A 6.95 gram sample of radioactive nobelium-259 has a half-life of 58 min. How much is left after 2 hours and 54 minutes?

Question 17 17. Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed?

Question 18 18. Nuclear binding energy can be defined as the amount of energy needed to break one _____ of nuclei into individual nucleons.

Question 19 19. It is harder to break apart a nucleus with _____ energy than a nucleus with _____ energy.

Question 20 20. What type of atomic particle differs in number among radioactive isotopes of the same element?

Page 5

Question 21 21. All the choices are the uses of the radioactive isotopes shown below EXCEPT:

Question 22 22. In uranium-lead dating, we see that two unstable uranium isotopes decay into stable lead isotopes. Which of the following statements is true about this decay?

Question 23 23. Which of the following statements is true of radiocarbon dating?

Question 24 24. For nuclear fusion to occur, very high temperatures and pressures are needed. The high pressure gets the atomic nuclei close enough to one another to fuse. What does high temperature do to allow the fusion process?

Question 25 25. In proton-proton fusion the final helium-4 atom weighs less than the original four hydrogen atoms that fused together. This excess mass was converted to energy. We can see the relation of mass to energy for this reaction in Einstein's famous equation E = mc^2, where 'E' is energy, 'm' is mass, and 'c' is the speed of light. Knowing all this, which of the following is true?

Page 6

Question 26 26. Which of the following has a mass of 1 and an atomic number of 1?

Question 27 27. Despite human skin providing protection against alpha particles, why is it dangerous to ingest alpha particles?

Question 28 28. What charge does a particle from a beta minus decay have?

Question 29 29. The half life of a radioactive substance, I-123, is 13 hours. How much of a 64 mg sample of I-123 is left after 26 hours?

Question 30 30. What is critical mass?

Basics of Nuclear Physics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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